powerpc/mm: Fix check of multiple 16G pages from device tree

The offset of hugepage block will not be 16G, if the expected
page is more than one. Calculate the totol size instead of the
hardcode value.

Fixes: 4792adbac9eb ("powerpc: Don't use a 16G page if beyond mem= limits")
Signed-off-by: Rui Teng <rui.teng@linux.vnet.ibm.com>
Tested-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 7a20669c19e7258d979d60a19f3acec378c9dbad..7419fc1854ad2277c8df613c718fbf202669d221 100644 (file)
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -507,7 +507,7 @@ static int __init htab_dt_scan_hugepage_blocks(unsigned long node,
        printk(KERN_INFO "Huge page(16GB) memory: "
                        "addr = 0x%lX size = 0x%lX pages = %d\n",
                        phys_addr, block_size, expected_pages);
-       if (phys_addr + (16 * GB) <= memblock_end_of_DRAM()) {
+       if (phys_addr + block_size * expected_pages <= memblock_end_of_DRAM()) {
                memblock_reserve(phys_addr, block_size * expected_pages);
                add_gpage(phys_addr, block_size, expected_pages);
        }